Wood-pulp engine



J. CHASE. Wood Pulp Engine.

No; 233,071. Patented Oct. 12, 1880.

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JEFFERSON CHASE, OF ORANGE, MASSACHUSETTS.

WOOD-PULP ENGINE.

SPECIFICATION forming part of Letters Patent No. 233,071, dated October12, 1880.

Application filed February 24, 1880.

To all whom it may concern:

Be it known that I, JEFEERsoN CHASE, of Orange, in the county ofFranklin, State of Massachusetts, haveinvented certain Improvements inVVood-Pulp Engines, of which the following is a specification.

This invention is an improvement on a class of engines for reducing woodfiber to pulp, as shown and described in Letters Patent of the UnitedStates issued to me on the 3d day of October, 1876, and numbered182,891.

My present improvements relate to means for elevating and depressing theadjustable stone with respect to the stationary stone, in order tocompensate for wear or regulate the gage or capacity of the engine; andit consists in details of mechanism, as hereinafter de' scribed.

In my patented engine above referred to the rotary stone was placedabove the stationary stone, and the mechanism for adjusting said rotarystone was placed above the latter at the top of the engine.

I have found in practical operation with the engine that the adjustingmechanism shown in my patent and its position above the upper stoneisattended with several objections, which I avoid by placing the rotarystone below the stationary stone, and the adjusting mechanism below thelatter, while the nature of the adjusting mechanism shown in the presentinstance is such that it operates to better advantage than that in thepatent.

The drawing accompanying this specification represents a sectionalelevation of an engine embodying my improvements.

The frame of the engine is shown in said drawing as composed of twoupright side standards or housings, A A, erected at bottom upon a commonbed-plate or foundation, B, and at top bridged by a flat plate, 0, thewhole being of solid material and securely bolted together.

The two horizontal grinding disks or stones are shown at D and E asdisposed within an upright hollow cylinder, F, which constitutes thegrinding-chamber of the engine, of which the plate 0 is the bottom, suchchamber or cylinder being erected centrally upon the said plate 0, andhaving at bottom a chute or spout, G, to permit of escape of the pulp,the upper and stationary stone, D, being secured to or within the cap orcover A of the cylinder F, while-an axial opening, a or b, is createdinboth the cap A and stoneD, through which the material to be groupd isprecipitated between the two stones. The lower and revolving stone, E,is secured to the upper end of a vertical shaft, 1, which finds abearing immediately below such stone in the bridge-plate C, while thelower end of such shaft is stepped in a cup-shaped block, 0, disposedwithin a recessed hub or annular flange, d, erected upon a horizontalsliding beam or cross-head, e, which is supported in guides or grooves ff, erected in the inner faces of the standards A A, the hollow step orcup 0 being confined to the hub d by bolts 8 s, &c., in such manner thatshould any discrepancy from wear or otherwise occur in the relativepositions of the shaft and cross-head the height of the step may beraised to compensate for such discrepancy, while the cup constitutes areceptacle for lubricating material, and the recess of the hub tocontain flowing water.

To effect the elevation or depression of the lower stone I employ thefollowingmeohanism: Upon each side of the shaft I, I dispose an uprightshaft, 9, and I out upon the lower end of each of these shafts ascrew-thread, which screws through a female screw-thread tapped in ahole in the cross-head 0, each shaft at its lower end resting upon thebase B, and near its upper end being journaled in a bracket, h,extending horizontally inward from the adjacent standard A. To the topof each shaft g, I secure a worrn-gear ,'i, which engages a worm, 7c,fixed upon a horizontal shaft, 1, which is mounted in bearings in thestandards AA,

one end of such shaft extending through the standard and having amiter-gear, m, fixed to it, which meshes into a second miter-gear, a,fixed to the lower end of a vertical shaft or rod, 0, this latter shaftbeing mounted in guides 12 19 extending from the outside of thestandard, and having a hand-wheel, r, affixed to its upper end.

By means of the handwheel, whose rotations are transmitted to thescrew-threaded shafts g g through the miter-gears m and n and worm andworm-gears t i and k k, the attendant is enabled to elevate the lowerstone to compencross-head and carrying Worm-gears by which they receiverotary motion, the worm-gears engaging Worms mounted upon a horizontalshaft suitably journaled in the engine-frame and carrying at one end amiter-gear, and the upright hand shaft or rod carrying a mitergear toengage the gear on the worm-shaft, the whole operating as stated.

JEFFERSON CHASE.

sate for its wear or to change the gage of the engine.

I claim The herein-described mechanism for effecting the adjustment ofthe lower or rotary stone, consisting of the following elements incombination with such lower stone and its supporting-shaft, to Wit: thesliding cross-head guided by'upright grooves in the standards of theengine-frame and supporting, by an ad- Witnesses: justable step theweight of said lower stone, F. OUSTIS, the twin screw-threaded shaftsactuating such H. E. LODGE.

